With 2018 now upon us and second decade of the 21st century starting to draw to a close, one might claim that this decade was not kind to U.S. aviation. The merger mania that dominated the early portion of the decade saw airlines like US Airways, Continental, and AirTran disappear from the skies, while airline startups like PEOPLExpress failed to launch. However, there has been one large influx of options for U.S. travellers, and that comes in the international market. [caption…